In The Concept of Nature, Alfred North Whitehead discusses the interrelatedness of time, space, and human perception.The idea of objects as ‘occasions of experience’, arguments against body-mind duality and the search for an all-encompassing ‘philosophy of nature’ are examined, with specific reference to contemporary (Einstein, with whose theory of relativity he has some complaints) and ancient (Plato, Aristotle) approaches.

In 1907 Wallace wrote the short book Is Mars Habitable? to criticize the claims made by Percival Lowell that there were Martian canals built by intelligent beings. Wallace did months of research, consulted various experts, and produced his own scientific analysis of the Martian climate and atmospheric conditions. Among other things Wallace pointed out that spectroscopic analysis had shown no signs of water vapor in the Martian atmosphere, that Lowell’s analysis of Mars’ climate was seriously flawed and badly overestimated the surface temperature, and that low atmospheric pressure would make liquid water, let alone a planet girding irrigation system, impossible.

The Chemical Constituents of Piper Methysticum or The Chemical Constituents of the Active Principle of The Ava Root is the text of a Master’s Degree thesis presented in June 1915 by Alice A. Ball. Ms. Ball was the first woman and African American to receive a Master’s Degree from the University of Hawaii. Her thesis includes some history of the use of the ava root in the South Pacific islands along with the isolation and analysis of the extracts of the kava root and some preliminary observations of its effects when administered to animals. - Summary by J. M. Smallheer

Allan Pinkerton (1819-1884), a Scotsman by birth and a barrel-maker by trade, settled in Chicago in its infancy and founded the Pinkertons, the world's first detective agency. Though events associated with the agency after his death have tarnished the name, Pinkerton himself was one of the original human rights advocates. He was a dear friend to John Brown, an advisor to Abraham Lincoln, and 80 years ahead of his time in hiring female detectives. He was also stubborn, irascible, and an egomaniac...

This recording contains two original documents. 1) Life of James Mars, a Slave Born and Sold in Connecticut, by James Mars . James Mars was born in Connecticut in 1790 and spent the better part of his youth a slave working for various owners—once fleeing to the woods with his family to avoid being relocated to the South. At age twenty-five he became a free man and moved to Hartford, Connecticut, where he became a leader in the local African American community. His memoir is one of the more famous accounts of slave life in early New England...

If it is possible to conquer space, then perhaps it is also possible to conquer time. At least that was the theory American scientists were exploring in an effort to explain the new sources of knowledge the Russians possessed. Perhaps Russian scientists had discovered how to transport themselves back in time in order to learn long-forgotten secrets of the past. That was why young Ross Murdock, above average in intelligence but a belligerently independent nonconformist, found himself on a “hush-hush” government project at a secret base in the Arctic...

This is Book 4 in the Time Traders Series, In this book Ross Murdock and Arthur Ashe continue their adventures in Time and Space on the World of Hawaika. Hawaiian and Polynesian settlers help Ross and Ashe discover the way the world has changed from the data tape to present time. Helped by a girl (Karara) and her two trained dolphins (Tino-rau and Taua)

Travis Fox and a band of fellow Apache AmerIndians have their racial memories and survival abilities enhanced by the Redax machine and are sent to the planet Topaz, one of the few worlds of the ancient star empire that the US has voyage tapes to. But the Reds have “snooped” the tapes and get there first, and have a nasty surprise waiting for any ship that does not have the proper identification. Travis and some of his fellow Apaches survive the ensuing crash landing…but can they defeat the Reds and win Topaz for themselves? This work is a sequel to both The Time Traders and Galactic Derelict...

An air force pilot adrift in peacetime is recruited to join an Antarctic expedition. When a strange mist downs his plane he discovers an ancient alien civilization which has prophesized his arrival. Now he and his faithful pet Ana must descend to the depths of the crater and face the Black Ones in order to rescue the fair Thrala, daughter of the Ancient Ones. – Andre Norton (Alice Mary Norton) was a popular author of science fiction and fantasy who began publishing stories in the early 1930s. “The People of the Crater” was first published in volume 1 number 1 of Fantasy Book in 1947.